According to one example of the present invention, a cooling system is provided. The cooling system comprises a water-cooled air conditioning module for cooling air from a chamber. The chamber is arranged for receiving air to be cooled and hot humid air. The cooling system also comprises a control system for controlling the flow of hot humid air to the chamber such that the air input to the air conditioning module has a predetermined relative humidity level within a predetermined range.

A cooling system includes a condenser and first and second cooling circuits. The condenser is configured to condense refrigerant to a liquid. The first cooling circuit includes a direct expansion valve coupled to the condenser, a first evaporator coil coupled to the direct expansion valve, and a compressor coupled to the first evaporator coil. The first cooling circuit receives at least a first portion of the liquid refrigerant and output first refrigerant vapor, and the compressor receives the first refrigerant vapor and output a compressor refrigerant output to the condenser. The second cooling circuit includes a pump coupled to the condenser, an economizer valve coupled to the pump, and a second evaporator coil coupled to the economizer valve. The second cooling circuit receives at least a second portion of the liquid refrigerant and output a second vapor refrigerant to the condenser.

A cooling system includes a condenser and first and second cooling circuits. The condenser is configured to condense refrigerant to a liquid. The first cooling circuit includes a direct expansion valve coupled to the condenser, a first evaporator coil coupled to the direct expansion valve, and a compressor coupled to the first evaporator coil. The first cooling circuit receives at least a first portion of the liquid refrigerant and output first refrigerant vapor, and the compressor receives the first refrigerant vapor and output a compressor refrigerant output to the condenser. The second cooling circuit includes a pump coupled to the condenser, an economizer valve coupled to the pump, and a second evaporator coil coupled to the economizer valve. The second cooling circuit receives at least a second portion of the liquid refrigerant and output a second vapor refrigerant to the condenser.

A heat sink module for cooling a heat providing surface can include an inlet chamber and an outlet chamber formed within the heat sink module. The outlet chamber can have an open portion that can be enclosed by the heat providing surface when the heat sink module is installed on the heat providing surface. The heat sink module can include a dividing member disposed between the inlet chamber and the outlet chamber. The dividing member can include a first plurality of orifices extending from a top surface of the dividing member to a bottom surface of the dividing member. The first plurality of orifices can be configured to deliver a plurality of jet streams of coolant into the outlet chamber and against the heat providing surface when the heat sink module is installed on the heat providing surface and when pressurized coolant is provided to the inlet chamber.

An ejector and a refrigeration cycle apparatus having an ejector are provided. The ejector may include an ejector body having a suction portion into which a high pressure refrigerant and a low pressure refrigerant may be suctioned, and having a mixing portion provided at one side of the suction portion and configured to mix the high pressure refrigerant with the low pressure refrigerant; a nozzle movably provided in the suction portion, and configured to inject the high pressure refrigerant; a needle inserted into an end of the nozzle and configured to control a flow sectional area of the nozzle; and a nozzle drive configured to drive the nozzle so as to be relatively movable with respect to the mixing portion and the needle. As a flow sectional area of a high pressure refrigerant passage and a flow sectional area of a low pressure refrigerant passage are controlled, a driving efficiency of the ejector may be enhanced.

An ejector and a refrigeration cycle apparatus having an ejector are provided. The ejector may include an ejector body having a suction portion into which a high pressure refrigerant and a low pressure refrigerant may be suctioned, and having a mixing portion provided at one side of the suction portion and configured to mix the high pressure refrigerant with the low pressure refrigerant; a nozzle movably provided in the suction portion, and configured to inject the high pressure refrigerant; a needle inserted into an end of the nozzle and configured to control a flow sectional area of the nozzle; and a nozzle drive configured to drive the nozzle so as to be relatively movable with respect to the mixing portion and the needle. As a flow sectional area of a high pressure refrigerant passage and a flow sectional area of a low pressure refrigerant passage are controlled, a driving efficiency of the ejector may be enhanced.

The present invention relates to a passive type organic working fluid ejector refrigeration method. The liquid organic working fluid of the reservoir is added to evaporator using gravity. Then the refrigerant absorbs heat during evaporation in the evaporator. When the refrigerant temperature and pressure increases to a certain value, the self-operated pressure regulator valve automatically opens and the ejector begins to work. After condensing in the condenser, the working fluid divided into two streams. One stream returns to the reservoir and the other one flows into the cooling evaporator of refrigeration cycle to produce chilled water about 12° C. When the liquid refrigerant is completely evaporated in the evaporator, the self-operated pressure regulator valve opens and the working fluid flows into the evaporator from the reservoir. A certain quality of the working fluid is closed in the evaporator, preparing for a new work cycle as above-mentioned. The system of the present invention can use organic fluid as the working fluid to utilize the low-temperature heat sources range from 60 to 200° C., using groundwater, river (sea) water or air as cold source and using gravity to transport liquid working fluid.

The present invention relates to a passive type organic working fluid ejector refrigeration method. The liquid organic working fluid of the reservoir is added to evaporator using gravity. Then the refrigerant absorbs heat during evaporation in the evaporator. When the refrigerant temperature and pressure increases to a certain value, the self-operated pressure regulator valve automatically opens and the ejector begins to work. After condensing in the condenser, the working fluid divided into two streams. One stream returns to the reservoir and the other one flows into the cooling evaporator of refrigeration cycle to produce chilled water about 12° C. When the liquid refrigerant is completely evaporated in the evaporator, the self-operated pressure regulator valve opens and the working fluid flows into the evaporator from the reservoir. A certain quality of the working fluid is closed in the evaporator, preparing for a new work cycle as above-mentioned. The system of the present invention can use organic fluid as the working fluid to utilize the low-temperature heat sources range from 60 to 200° C., using groundwater, river (sea) water or air as cold source and using gravity to transport liquid working fluid.

A cooling device including a freezing cycle including a compressor, a condenser, a pressure reducing means, and an evaporator is provided. In the cooling device, the condenser includes a first condenser and a second condenser independent from each other, the second condenser being positioned at a downstream side of the first condenser in a refrigerant channel, and the first condenser and the second condenser are connected to each other through a dew condensation preventing pipe.

The technology disclosed is a two stage Indirect/Direct Evaporative Cooling (IDEC) cycle whose novel closed loop topology compels system convergence to a stable operating state, wherein air cooling takes place mostly in the indirect stage. The direct stage then serves principally as a water chiller for that process.